Think outside the box. Or, in this case, the hotel. Alternative properties like condos and private homes often seem more expensive, but when you factor in the use of your own kitchen—and the savings that comes with eating at home rather than dining out for every meal—they can actually be much, much cheaper.
I know: You don't want to spend your vacation slaving at the stove. But just buying some cereal for breakfast and deli meat for make-your-own sandwiches can save you a bundle: For a family of four, you could save at least $75 a day this way. Times that by a week's vacation, and you've shaved $450 off the cost of your trip.